CN202651806U - Smooth wind-power photovoltaic power generation control system of battery energy storage station - Google Patents
Smooth wind-power photovoltaic power generation control system of battery energy storage station Download PDFInfo
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- CN202651806U CN202651806U CN 201220165004 CN201220165004U CN202651806U CN 202651806 U CN202651806 U CN 202651806U CN 201220165004 CN201220165004 CN 201220165004 CN 201220165004 U CN201220165004 U CN 201220165004U CN 202651806 U CN202651806 U CN 202651806U
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Abstract
The utility model proposes a smooth wind-power photovoltaic power generation control system of a battery energy storage station. The control system comprises a communication interface, a communication main machine, a data memory and a power control device, wherein the communication main machine respectively reads the real-time data of a wind power generation field, a photovoltaic power generation field and the battery storage station in operation by communication interfaces, and is respectively connected with the data memory and the power control device by a communication network. The power control device comprises a dynamic slope controller and a power distributor connected with the dynamic slope controller. The control system not only satisfies the application requirement of the energy storage system for suppressing wind-power photovoltaic power generation wave, but also effectively reduces the utilization rate of the energy storage system, so as to reduce the battery deterioration to the maximum limit and ensure long-term operation of the battery energy storage system.
Description
Technical field
The utility model belongs to intelligent grid and stored energy and switch technology field, is specifically related to the level and smooth wind light generation control system of a kind of battery energy storage power station.
Background technology
Because characteristics such as the uncertainty of wind energy and photovoltaic generation etc. and unsteadiness, wind light generation produces the instantaneous rising of power or falls and will cause power output not steady, so that the thereupon constantly fluctuation of wind-powered electricity generation and photovoltaic power generation grid-connecting power.And proportion in electrical network constantly increases along with wind energy and photovoltaic generation, and the level and smooth control of wind-powered electricity generation and solar power generation power output more and more receives publicity.
Development along with battery and integrated technology thereof, application model large-scale distributed and centralized battery energy storage power station will progressively become a kind of preferred version, use battery energy storage system and go smooth wind power and solar power generation output pulsation to become gradually a kind of feasible program.By the current transformer of reasonable control connection on energy storage device, discharging and recharging of efficient realization energy-storage system, can solve to a great extent because the wind light generation power output instability problem that wind-powered electricity generation and photovoltaic generation randomness, intermittence and fluctuation etc. are brought, satisfying the level and smooth output requirement of wind-force and solar power generation, and effectively solve the problems such as the quality of power supply that fluctuation brings to mains frequency because wind-powered electricity generation and photovoltaic generation fluctuate.The wind-solar-storage joint electricity generation system is a kind of multi-energy system in essence, how to coordinate the work of each power-supply system, is that the multiple-energy-source hybrid power system is researched and developed a key issue.
The level and smooth requirement that battery energy storage power station can be exerted oneself according to wind-powered electricity generation and photovoltaic generation and being incorporated into the power networks with wind light generation fluctuation ratio requirement for restriction is to the level and smooth control of fluctuating of wind light generation power.Therefore, be necessary to carry out research and the proposition corresponding control methods of wind-solar-storage joint electricity generation system.At present the patent of relevant wind light generation output smoothing control aspect based on megawatt-grade high-power high capacity cell energy-accumulating power station, document, technical report etc. are considerably less, need further investigation and explore.
Present patent about the monitoring of the extensive battery energy storage power station of polymorphic type and the aspect that is incorporated into the power networks, document, technical report etc. are considerably less, need further investigation and exploration.
The utility model content
For overcoming the defective of prior art, the purpose of this utility model is to provide a kind of level and smooth wind light generation control system of battery energy storage power station of more efficient stable.
The supervisory control system of battery energy storage power station of the present utility model is achieved by the following technical solution:
The level and smooth wind light generation control system of a kind of battery energy storage power station, comprise communication interface, host computer communication, data storage and output control device, real time data when described host computer communication reads respectively wind power plant, photovoltaic generation field and battery energy storage power station operation by communication interface, described host computer communication is connected with output control device with data storage respectively by communication network.
Further, described output control device comprises dynamic slope controller and the power divider that is connected, the real time data that described dynamic slope controller reads by host computer communication generates the level and smooth desired value of wind light generation gross power, the level and smooth desired value of the wind light generation gross power that described power divider generates based on dynamic slope controller, determine battery energy storage power station overall power requirement value, and it is dispensed to battery energy storage power station.
Compared with prior art, the beneficial effects of the utility model are:
Control system of the present utility model adopts dynamic slope limiter, satisfied the rate of change boundary value of wind light generation gross power can be according to actual wind/light generator group ruuning situation online updating the time, and can realize based on dynamic slope limiter, when satisfying wind light generation fluctuation ratio requirement for restriction, effectively reduce the frequent burden of bringing of using of battery, reduced to greatest extent deterioration of battery, and the operation of guarantee battery health, the efficient control problem when stabilizing the wind light generation fluctuation to solve energy-accumulating power station.
Description of drawings
Fig. 1 is the system access schematic diagram of honourable storing cogeneration equipment in the utility model;
Fig. 2 is the enforcement block diagram of the level and smooth wind light generation control system embodiment based on dynamic slope limiter of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments monitoring system of the present utility model is described in further detail.
Figure 1 shows that the system access topological diagram of wind-solar-storage joint generating equipment.As shown in Figure 1, the wind-solar-storage joint electricity generation system of battery energy storage power station access comprises wind power plant, photovoltaic generation field, battery energy storage power station and electrical network.Wind power plant, photovoltaic generation field and battery energy storage power station are connected with electrical network by transformer respectively.The inside connection diagram of wind power plant and photovoltaic generation field is omitted at this.Comprise a plurality of lithium battery energy storage battery units that are in parallel in the battery energy storage power station, comprise two way convertor and a plurality of lithium ion battery group in each energy storage unit, can carry out the on off control of lithium battery energy storage battery unit and discharge and recharge power instruction etc. by two way convertor.
Fig. 2 is the enforcement block diagram of the level and smooth wind light generation control system of the energy-accumulating power station based on dynamic slope limiter of the present utility model embodiment.As shown in Figure 2, control system in this example comprises: communication interface, host computer communication, data storage, output control device, wherein, host computer communication reads wind power plant by communication interface, real time data when photovoltaic generation field and battery energy storage power station operation, and be sent to data storage and store, output control device generates the level and smooth desired value of wind light generation and energy-accumulating power station overall power requirement value according to real time data, and in the storage data storage: be sent to battery energy storage power station by host computer communication via the communication interface overall power requirement value that battery energy storage power station is required on the one hand; Exporting the level and smooth desired value of wind light generation and energy-accumulating power station overall power requirement value to the outer monitoring device by host computer communication on the other hand monitors.
The real time data that reads by host computer communication comprises: the maximum of wind power generation total power value, photovoltaic generation total power value, each wind turbine generator running status value, each wind turbine generator power-handling capability, each photovoltaic generation unit running status value, each photovoltaic generation unit power-handling capability, wind light generation fluctuation ratio limits value and battery energy storage power station allows discharge power value and the maximum charge power value etc. that allows.
Described output control device comprises dynamic slope controller and the power divider that is connected, described dynamic slope controller is used for the level and smooth desired value of the wind light generation gross power of definite input, the level and smooth desired value of the wind light generation gross power that described power divider generates based on dynamic slope controller, determine battery energy storage power station overall power requirement value, and it is dispensed to battery energy storage power station.
Described level and smooth wind light generation is to obtain by the following method with battery energy storage power station overall power requirement value:
In the following formula,
For dynamic slope controller power output, as the level and smooth target power value of wind light generation; P
Scene is totalBe the wind light generation total power value, as dynamic slope controller input power, this wind light generation total power value equals wind power generation total power value and the photovoltaic generation total power value sum that host computer communication reads; P
Energy storage is totalBe battery energy storage power station overall power requirement value.Wherein, ask for
Concrete grammar be:
A) based on each wind turbine generator operating state signal, each wind turbine generator power-handling capability, each photovoltaic generation unit operating state signal and each photovoltaic generation unit power-handling capability, calculate the current wind light generation unit total value that is incorporated into the power networks by following formula (2) and decide power:
In the following formula,
Rated power for blower fan unit k; u
Wind-powered electricity generation kBe the running status of blower fan unit k, when this blower fan unit k moves when controlled, this state value is 1, and other values are 0;
Rated power for photovoltaic unit k; u
Photovoltaic kBe the running status of photovoltaic unit k, when this photovoltaic unit k moves when controlled, this state value is 1, and other values are 0; W is blower fan unit number; V is photovoltaic unit number; Above-mentioned each data communication device is crossed host computer communication and is directly read.
B) decide power and wind light generation fluctuation ratio limits value based on the current wind light generation unit total value that is incorporated into the power networks, calculate in real time the pace of change of restricting signal required in the dynamic slope controller, that is, rise/fall rate of change limit value is calculated following formula (3)-(4) respectively:
In the following formula,
Rising rate of change limit value for dynamic slope controller input power;
Decline rate of change limit value for dynamic slope controller input power;
Be wind light generation fluctuation ratio limits value; T
Time scaleBe the investigation time interval of rate of change.
C) the dynamic slope controller power output that initial time (t=1) is set is sampled and is input to the wind light generation total power value of dynamic slope controller for first;
D) decide power and wind light generation fluctuation ratio limits value based on the current wind light generation unit total value that is incorporated into the power networks, calculate in real time the pace of change of restricting signal required in the dynamic slope controller;
In the following formula, P
Scene is total(t) be the wind light generation total power value (kW of unit) of current sampling instant t, this wind light generation total power value equals t sampling instant wind power generation total power value and photovoltaic generation total power value sum, can directly read by host computer communication; P
Scene is total(t-1) be the wind light generation total power value (kW of unit) of last sampling instant; Δ t is for being limited signal (the being wind light generation total power value signal) sampling period.
E) judge based on the rate of change restrictive condition, until try to achieve the dynamic slope controller power output of current sampling instant
Till; Dynamic slope controller power output is each time stored, call when judging based on the rate of change restrictive condition for next sampling instant as basic data.The described concrete grammar of judging based on the rate of change restrictive condition is as follows:
If
Then
If
Then
If
Then
In the formula,
Be the power output (being the power output of the dynamic slope controller of t sampling instant) after the restriction of current sampling instant (being the t sampling instant) process rate of change;
Be the power output (being the power output of the dynamic slope limiter module of t-1 sampling instant) after the restriction of last sampling instant process rate of change.Per two neighbouring samples are a sampling time (being the sampling period) Δ t constantly.
F) with current sampling instant (t sampling instant) dynamically the slope controller power output be made as the level and smooth desired value of wind light generation gross power of current sampling instant (t sampling instant)
Namely
This control system not only can satisfy the application requirements of energy-storage system being stabilized the wind light generation fluctuation, can also effectively reduce the utilance of energy-storage system, realizes reducing to greatest extent deterioration of battery, ensures the operation of battery energy storage system long-life.
Should be noted that at last: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; in conjunction with above-described embodiment the utility model is had been described in detail; those of ordinary skill in the field are to be understood that: those skilled in the art still can make amendment or are equal to replacement embodiment of the present utility model, but these modifications or change are all among the claim protection range that application is awaited the reply.
Claims (2)
1. level and smooth wind light generation control system of battery energy storage power station, it is characterized in that, this control system comprises communication interface, host computer communication, data storage and output control device, real time data when described host computer communication reads respectively wind power plant, photovoltaic generation field and battery energy storage power station operation by communication interface, described host computer communication is connected with output control device with data storage respectively by communication network.
2. the system as claimed in claim 1, it is characterized in that, described output control device comprises interconnective dynamic slope controller and power divider, the real time data that described dynamic slope controller reads by host computer communication generates the level and smooth desired value of wind light generation gross power, the level and smooth desired value of the wind light generation gross power that described power divider generates based on dynamic slope controller, determine battery energy storage power station overall power requirement value, and it is dispensed to battery energy storage power station.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326391A (en) * | 2013-06-14 | 2013-09-25 | 深圳供电局有限公司 | New energy grid-connected tie line power smooth control method and device |
| WO2015054878A1 (en) * | 2013-10-18 | 2015-04-23 | 中国电力科学研究院 | Change rate-based method and system for controlling energy storage power station in smoothing wind/light fluctuations |
| CN104852399A (en) * | 2015-05-18 | 2015-08-19 | 国家电网公司 | Method of dynamically optimizing energy storage capacity of optical storage micro-grid system |
| CN105406504A (en) * | 2015-10-27 | 2016-03-16 | 四川科陆新能电气有限公司 | Optical storage power station grid-connected power smoothing method based on battery SOC (State of Charge) |
| CN105870951A (en) * | 2015-02-11 | 2016-08-17 | Ls产电株式会社 | Battery energy storage system |
| CN109474016A (en) * | 2018-12-19 | 2019-03-15 | 北京工业大学 | Caravan/family wind-light-electricity complementary energy-storage system Energy Management System and method |
-
2012
- 2012-04-18 CN CN 201220165004 patent/CN202651806U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326391A (en) * | 2013-06-14 | 2013-09-25 | 深圳供电局有限公司 | New energy grid-connected tie line power smooth control method and device |
| CN103326391B (en) * | 2013-06-14 | 2015-07-29 | 深圳供电局有限公司 | New energy grid-connected tie line power smooth control method and device |
| WO2015054878A1 (en) * | 2013-10-18 | 2015-04-23 | 中国电力科学研究院 | Change rate-based method and system for controlling energy storage power station in smoothing wind/light fluctuations |
| CN105870951A (en) * | 2015-02-11 | 2016-08-17 | Ls产电株式会社 | Battery energy storage system |
| US10003199B2 (en) | 2015-02-11 | 2018-06-19 | Lsis Co., Ltd. | Battery energy storage system |
| CN105870951B (en) * | 2015-02-11 | 2018-07-17 | Ls产电株式会社 | Battery energy storage system |
| CN104852399A (en) * | 2015-05-18 | 2015-08-19 | 国家电网公司 | Method of dynamically optimizing energy storage capacity of optical storage micro-grid system |
| CN105406504A (en) * | 2015-10-27 | 2016-03-16 | 四川科陆新能电气有限公司 | Optical storage power station grid-connected power smoothing method based on battery SOC (State of Charge) |
| CN105406504B (en) * | 2015-10-27 | 2017-12-12 | 四川科陆新能电气有限公司 | A kind of light storage grid-connected power smooth method in power station based on battery SOC |
| CN109474016A (en) * | 2018-12-19 | 2019-03-15 | 北京工业大学 | Caravan/family wind-light-electricity complementary energy-storage system Energy Management System and method |
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